RESUMO
Dactylitis refers to a global swelling of a finger or a toe giving it a clinical sausage-shape presentation. It is an extremely suggestive symptom as it guides the rheumatologist towards a shortlist of diagnoses. However, radiologists are less familiar with dactylitis. The aim of this review is to detail and illustrate the main causes of dactylitis using standard X-ray imaging, ultrasound, computed tomography and magnetic resonance imaging in order to make radiologists more familiar with this symptom by illustrating the various conditions that are associated with dactylitis including infection, peripheral spondyloarthritis, sarcoidosis, microcrystalline deposition, osteoid osteoma, and sickle cell disease.
Assuntos
Artrite/diagnóstico por imagem , Articulações dos Dedos , Articulação do Dedo do Pé , Adulto , Idoso , Edema/diagnóstico por imagem , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Adulto JovemRESUMO
In 1892, J. Wolff, an orthopedic surgeon, stated that the internal architecture and shape of a bone were related to the direction of stresses placed upon it. Conventional radiographs and MRI can demonstrate the adaptability of bones to stresses. Imaging also demonstrates that this adaptability has limitations, and that excessive stress may lead to fracture.
Assuntos
Diagnóstico por Imagem , Fraturas de Estresse/diagnóstico , Processamento de Imagem Assistida por Computador , Fenômenos Biomecânicos , Osso e Ossos/fisiopatologia , Fraturas por Compressão/diagnóstico , Fraturas por Compressão/fisiopatologia , Fraturas de Estresse/fisiopatologia , Humanos , Aumento da Imagem , Músculo Esquelético/fisiopatologia , Fraturas por Osteoporose/diagnóstico , Fraturas por Osteoporose/fisiopatologia , Sensibilidade e EspecificidadeRESUMO
Spinal cord abscesses are extremely rare, even in intravenous drug abusers. They usually have a poor prognosis unless diagnosed and treated promptly. MRI is the best imaging modality for diagnosis and follow-up. We report a 42-year-old man, an active intravenous drug user, HIV negative, who developed subacute tetraplegia from an intramedullary abscess caused by Staphylococcus aureus. Immediate decompressive surgery and antibiotic treatment led to progressive recovery.